CN110403577B

CN110403577B - Sleep quality monitoring device and method based on optical fiber microbend pressure induction

Info

Publication number: CN110403577B
Application number: CN201910728687.3A
Authority: CN
Inventors: 林晓艳; 刘翔鹏; 牛小茜; 林沫彤
Original assignee: Shanghai Institute of Technology
Current assignee: Shanghai Institute of Technology
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2022-04-01
Anticipated expiration: 2039-08-05
Also published as: CN110403577A

Abstract

The invention provides a sleep quality monitoring device and method based on optical fiber microbend pressure induction, wherein the device comprises: the device comprises a light source (10), a multimode optical fiber (11), a deformer, a photoelectric detector and a signal processing circuit (13); the deformer is arranged in the pillow inner according to an array arrangement mode to obtain an optical fiber microbend induction array (12), and the deformer is connected with the light source and the signal processing circuit through the multimode optical fiber; the deformer is used for sensing the pressure of each point of the pillow inner, and different optical fiber bending losses can be formed when the pillow inner is subjected to pressure changes or the pressure action position changes; the signal processing circuit is used for monitoring the sleep quality of the user according to the change condition of the bending loss of the optical fiber. The invention integrates the sleeping pillow and the sleep monitoring, realizes the non-inductive non-wearable sleep monitoring, ensures the requirements of dynamic and real-time measurement, and has simple technology and easy realization.

Description

Sleep quality monitoring device and method based on optical fiber microbend pressure induction

Technical Field

The invention relates to the technical field of light measurement, in particular to a sleep quality monitoring device and method based on optical fiber microbend pressure sensing.

Background

In recent years, the sleep problem has been highlighted and has become an important public health problem. Chinese sleep index reports show that about one third of people in China have serious sleep problems. It is worrisome that this ratio is increasing with the pace of life and the increasing social pressure. Therefore, the household portable sleep quality monitor is produced at the same time.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a sleep quality monitoring device and method based on optical fiber microbend pressure induction.

The invention provides a sleep quality monitoring device based on optical fiber microbend pressure induction, which comprises: the device comprises a light source, a multimode optical fiber, a deformer, a photoelectric detector and a signal processing circuit; the deformer is arranged in the pillow inner in an array arrangement mode and is connected with the light source, the photoelectric detector and the signal processing circuit through the multimode optical fiber; the deformer is used for sensing pressure change of each point of the pillow inner, and when the pillow inner is subjected to pressure change or pressure action position change, optical fiber bending loss can be formed; the signal processing circuit is used for monitoring the sleep quality of the user according to the change condition of the bending loss of the optical fiber.

Optionally, the number of the deformers per unit area of the pillow core is changed in a gradient manner, or the arrangement depth of the deformers per unit area of the pillow core is changed in a gradient manner.

Optionally, the multimode optical fiber passes through the deformer array which is non-uniformly arranged in a serpentine shape, the light source is connected with one end of the multimode optical fiber through the FC optical fiber connector, and the other end of the multimode optical fiber is connected with the signal processing circuit through the photodetector.

Optionally, the deformer on the pillow core is arranged in three separate sensing areas.

Optionally, the deformers in each sensing area are uniformly arranged, and three independent multimode fibers respectively penetrate through the deformers in the three sensing areas.

Optionally, the light source is connected to three multimode fibers after passing through the 1 × 3 fiber beam splitter, and the other ends of the three multimode fibers are connected to the signal processing circuit through photodetectors.

Optionally, the light loss value in the multimode fiber may change with the pressure change applied to the pillow core or the pressure applied to the pillow core, and when the light loss value change amount is greater than a preset value, the counter of the signal processing circuit operates to record the frequency of the user turning over, leaving the bed, and the sleep duration.

Optionally, the deformer is made of a ductile material; the light source and the signal processing circuit are installed in a closed mode through radiation-proof materials.

The invention also provides a sleep quality monitoring method based on optical fiber microbending pressure induction, which is applied to any one of the sleep quality monitoring devices based on optical fiber microbending pressure induction and used for monitoring the sleep quality of a user.

Compared with the prior art, the invention has the following beneficial effects:

according to the sleep quality monitoring device and method based on optical fiber microbending pressure induction, the optical fiber microbending sensor is placed in the pillow core to form the intelligent pillow integrated with the pillow, so that the intelligent pillow is used for sleeping and has the function of monitoring the sleep quality; by detecting the head dynamic state, the sleeping time length, the bed leaving times and the sleeping time period can be recorded in real time. The invention realizes integration of the sleeping pillow and the sleep monitoring, realizes non-inductive non-wearable sleep monitoring, ensures the requirements of dynamic and real-time measurement, and has simple technology and easy realization.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural diagram of a sleep quality monitoring device based on optical fiber microbend pressure sensing provided by the invention;

fig. 2 is a schematic diagram of a deformer arrangement according to a first embodiment of the present invention;

fig. 3 is a schematic diagram of a deformer arrangement according to a second embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

Fig. 1 is a schematic structural diagram of a sleep quality monitoring device based on optical fiber microbend pressure sensing according to the present invention, as shown in fig. 1, a light source 10 is connected to a multimode optical fiber 11, the multimode optical fiber 11 is connected to an optical fiber microbend pressure sensing array 12, the optical fiber microbend pressure sensing array 12 may be arranged in the manner shown in fig. 2 or fig. 3, and an optical fiber output end of the optical fiber microbend pressure sensing array 12 transmits light waves into a photodetector and a signal processing circuit 13 for data processing. When the pressure point of the head changes, the multimode optical fiber senses instantly, and the optical fiber generates bending loss.

Specifically, as shown in fig. 2, the deformers are arranged in two dimensions, and then the number of deformers per unit area or the modulation depth of the deformers in uniform distribution can be changed in a gradient manner by adjusting the number of deformers per unit area or changing the modulation depth of the deformers in uniform distribution.

Specifically, as shown in fig. 3, the pillow core is divided into three independent areas for arranging deformers. For ease of discrimination, the fiber loss states of three separate regions may be encoded.

Referring to fig. 2 and 3, in particular embodiments, one multimode fiber may be routed in a serpentine fashion around a specially routed deformer array, or three separate multimode fibers may be routed around deformer arrays in three zones.

For the arrangement structure in fig. 2, the light source may be connected to one end of the multimode fiber through an FC fiber connector, and the other end of the multimode fiber is connected to the signal processing circuit through a photodetector.

For the arrangement structure in fig. 3, a light source may be arranged to pass through 1 × 3 fiber beam splitters and then be connected to one end of each multimode fiber, and the other ends of the three multimode fibers are connected to a signal processing circuit through photodetectors.

Specifically, when the head pressure point changes, the multimode optical fiber senses instantaneously, the optical fiber generates bending loss, the optical loss value in the optical fiber in fig. 2 changes obviously along with the change of the head pressure point, and when the difference of the loss values is larger than a certain set value, the counter accumulates and counts and displays. Similar to the principle, the optical loss values in the three optical fibers in fig. 3 will be different according to the pressure point of the head. By encoding the three regions, counting and display can be made in accordance with the encoding change.

Because the light loss value in the optical fiber can obviously change along with the change of the pressure point of the head, when the difference of the loss values is larger than a certain set value, the counter can count in an accumulated way, and the real-time recording of the sleeping time, the bed leaving times and the sleeping time period is realized.

In an alternative embodiment, the sleep data may also be displayed in real time by the APP.

It should be noted that the deformer may be configured with different pitch parameters and modulation depth parameters, in addition to the arrangement shown in fig. 2 and 3. When the deformer is arranged in a partitioned mode, the deformer can be arranged into any shape.

In an alternative embodiment, the deformer is a flexible material and may be of any shape and configuration. The light source, the detector and the signal processing circuit are sealed by radiation-proof materials.

The sensor is arranged in the pillow core to form the intelligent pillow integrated with the pillow, the intelligent pillow is used for sleeping, has the function of monitoring the sleeping quality, is very practical for people with sleeping problems, and is very convenient because the monitoring product is not needed to be worn when people sleep at night. The non-wearable household sleep monitor can record sleep duration, bed leaving times and sleep time intervals in real time by detecting head dynamics, and is used for personalized intelligent analysis and motivation improvement of sleep. The sleep condition of the user is known through the sleep big data recorded in real time by the APP, and the user is protected for the healthy sleep.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. A sleep quality monitoring device based on optical fiber microbend pressure induction is characterized by comprising: the device comprises a light source, a multimode optical fiber, a deformer, a photoelectric detector and a signal processing circuit; the deformer is arranged in the pillow inner in an array arrangement mode and is connected with the light source, the photoelectric detector and the signal processing circuit through the multimode optical fiber; the number of the deformers per unit area of the pillow core is changed in a gradient manner, or the arrangement depth of the deformers per unit area of the pillow core is changed in a gradient manner; the deformer is used for sensing pressure change of each point of the pillow inner, and when the pillow inner is subjected to pressure change or pressure action position change, optical fiber bending loss can be formed; the signal processing circuit is used for monitoring the sleep quality of a user according to the change condition of the bending loss of the optical fiber; when the pressure point of the head changes, the multimode optical fiber in the deformer senses instantly, and the optical loss value in the multimode optical fiber changes along with the change of the pressure point of the head so as to detect the dynamic state of the head.

2. The optical fiber microbend pressure sensing-based sleep quality monitoring device according to claim 1, wherein a multimode optical fiber passes through a deformer array which is non-uniformly arranged in a serpentine shape, the light source is connected with one end of the multimode optical fiber through a FC optical fiber connector, and the other end of the multimode optical fiber is connected with the signal processing circuit through a photoelectric detector.

3. The optical fiber microbend pressure sensing-based sleep quality monitoring device according to claim 1, wherein the deformer on the pillow inner is arranged in three independent sensing areas.

4. The sleep quality monitoring device based on optical fiber microbend pressure induction according to claim 3, characterized in that deformers in each induction zone are uniformly arranged, and three independent multimode optical fibers are respectively threaded in the deformers in the three induction zones.

5. The sleep quality monitoring device based on optical fiber microbend pressure induction according to claim 4, characterized in that the light source is respectively connected with three multimode optical fibers after passing through 1 x 3 optical fiber beam splitters, and the other ends of the three multimode optical fibers are respectively connected with the signal processing circuit through photoelectric detectors.

6. The optical fiber microbend pressure sensing-based sleep quality monitoring device according to any one of claims 1 to 5, wherein the optical loss value in the multimode optical fiber changes with the pressure applied to the pillow core or the pressure applied position, and when the change amount of the optical loss value is greater than a preset value, the counter of the signal processing circuit works to record the turn-over frequency, the bed leaving frequency and the sleeping time of the user.

7. The optical fiber microbend pressure sensing-based sleep quality monitoring device according to any one of claims 1-5, wherein the deformer is made of a flexible material; the light source and the signal processing circuit are installed in a closed mode through radiation-proof materials.

8. A sleep quality monitoring method based on optical fiber microbend pressure induction is characterized by being applied to the sleep quality monitoring device based on optical fiber microbend pressure induction according to any one of claims 1 to 7 and used for monitoring the sleep quality of a user.